The Innokin Zenith Replacement Coils are to be used with the Zenith Tank and are available in 0.5 ohm head, rated 14 to 18W, 0.8 ohm coil head, rated for 15 to 18W, and the 1.6 ohm coil head, rated for 10 to 14W. Each pack of coils contains five (5) replacement coils.